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Vertical Blanking Interval (VBI) utilities
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### Compile Zapping with VPATH-making

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/CompileAndInstall.html

This example demonstrates how to compile Zapping using VPATH-making, allowing source and object code to reside in different directories. This is useful for maintaining a clean build environment.

```Shell
# We assume the source is in /usr/src/zapping
mkdir zap
cd zap
/usr/src/zapping/configure --prefix=/usr
make
```

--------------------------------

### Install Zapping after Compilation

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/CompileAndInstall.html

After successful compilation, this command installs Zapping to the directory specified during the `./configure` step. This makes the application available system-wide.

```Shell
make install
```

--------------------------------

### Install Zapping on Debian using apt-get

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/Download.html

Instructions to install the Zapping TV application on Debian-based systems using the apt-get package manager. This command fetches and installs the pre-compiled binary package from Debian mirrors.

```Linux Command Line
apt-get install zapping
```

--------------------------------

### Compile Zapping from Source on FreeBSD

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/CompileAndInstall.html

For FreeBSD and other Unix-like systems where GNU extensions are needed, `gmake` is used instead of `make`. The configuration prefix is typically set to `/usr/X11R6` for Gnome applications.

```Shell
cd zapping
./configure --prefix=/usr/X11R6
gmake
```

--------------------------------

### Compile Zapping from Source on Linux

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/CompileAndInstall.html

This snippet shows the basic steps to compile Zapping from its source code on a typical Linux system. It involves navigating to the source directory, configuring the build with a specified prefix, and then compiling the application.

```Shell
cd zapping
./configure --prefix=/usr
make
```

--------------------------------

### Generate ZVBI Build Configuration Files

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/ZVBI/Download.html

Before the first compilation of the ZVBI source code, run this script to create necessary configuration files. This step requires several GNU build tools to be installed.

```Shell
./autogen.sh
```

--------------------------------

### Start Quick Recording (zapping.quickrec)

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/ZappingCommands.html

Initiates recording immediately without requiring user confirmation via a dialog. It uses the last selected file name, appending an incrementing number. If no format is specified, the last used recording configuration will be applied.

```APIDOC
zapping.quickrec(format: str = None)
  format: Optional. The name of the recording configuration to use. If not provided, the last selected configuration is used.
```

--------------------------------

### Install ZVBI Library on Debian-based Systems

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/ZVBI/Download.html

Use the apt-get package manager to install the pre-compiled ZVBI library binaries on Debian and similar Linux distributions. This is the recommended method for users.

```Shell
apt-get install zvbi
```

--------------------------------

### Uninstall Zapping

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/CompileAndInstall.html

This command removes Zapping from the system. It must be executed from the same build directory where the application was compiled and installed.

```Shell
make uninstall
```

--------------------------------

### Legacy LIRC/ALIRC Plugin Commands for Zapping

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/ZappingCommands.html

This section lists commands supported by the LIRC/ALIRC plugin for Zapping, primarily for compatibility with older setups. These commands are largely superseded by the new Python command set but remain functional.

```APIDOC
QUIT: Terminate the program.
CHANUP: Switch to the next channel in the list.
CHANDOWN: Switch to the previous channel in the list.
SETCHANNEL n: The function of this command is affected by the preferences setting for entering channel numbers on the numeric keypad. By the default it switches to the nth channel in the list, the count starts at zero. Alternatively the number is interpreted as the RF channel number of the requested channel. Single digits combine to numbers when the command is executed repeatedly within a short period. For example "SETCHANNEL 1", "SETCHANNEL 3" jumps to channel 13.
ZOOM: Switch between fullscreen and windowed mode.
MUTE: When audio is on, mute it, when muted switch it back on.
VOL_UP: Increase the audio volume.
VOL_DOWN: Decrease the audio volume.
```

--------------------------------

### Generate Zapping Configuration Files with autogen.sh

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/Download.html

Command to run the autogen.sh script, which creates necessary configuration files prior to the first compilation of Zapping. This script requires several GNU build tools like autoconf or libtool to be installed.

```Shell
./autogen.sh --prefix=/usr
```

--------------------------------

### Execute Python Print Statement in Zapping

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/ZappingRemote.html

Sends a simple Python print statement to the Zapping process, which will execute it and display 'Hello!' on the console where Zapping was started.

```Bash
zapping_remote 'print "Hello!"'
```

--------------------------------

### Configure Basic Remote Control Buttons with LIRC

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/RemoteControls.html

This snippet demonstrates how to map remote control buttons to Zapping commands within the .lircrc file. Each entry defines a program (zapping_lirc), a button name, and the corresponding Zapping command to execute. Examples include volume control and channel setting.

```LIRC Config
begin
        prog   = zapping_lirc
        button = VOL_UP
        config = zapping.volume_incr(+5)
end

begin
        prog   = zapping_lirc
        button = 0
        config = SETCHANNEL 0
end

begin
        prog   = zapping_lirc
        button = 1
        config = SETCHANNEL 1
end

begin
        prog   = zapping_lirc
        button = 9
        config = SETCHANNEL 9
end
```

--------------------------------

### Implement Remote Control Mode Switching in LIRC

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/RemoteControls.html

This example illustrates how to create and switch between different command modes in LIRC using the 'mode' directive. It shows how a 'TV/RADIO' button can toggle between a 'zapping_lirc' mode and a 'radio' mode, allowing for context-dependent button actions.

```LIRC Config
begin zapping_lirc
        begin
                button = TV/RADIO
                mode   = radio
        end

        Zapping entries …
end zapping_lirc

begin radio
        begin
                button = TV/RADIO
                mode   = zapping_lirc
        end

        Other entries …
end radio

Mode-independend entries …
```

--------------------------------

### EIA 608 Closed Caption Special Characters (0x1130+n)

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/vbi/test/unicode-out-ref.txt

Defines a set of special characters for EIA 608 Closed Captioning, corresponding to the character codes starting from 0x1130, showing their visual representation.

```APIDOC
®°½¿™¢£♪à èâêîôû
®°½¿™¢£♪À ÈÂÊÎÔÛ
```

--------------------------------

### EIA 608 Closed Caption Extended Characters (0x1320+n)

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/vbi/test/unicode-out-ref.txt

Defines a set of extended characters for EIA 608 Closed Captioning, corresponding to the character codes starting from 0x1320, showing their visual representation.

```APIDOC
ÃãÍÌìÒòÕõ{}\_|~ÄäÖöß¥¤│ÅåØø┌┐└┘
ÃÃÍÌÌÒÒÕÕ{}\_|~ÄÄÖÖß¥¤│ÅÅØØ┌┐└┘
```

--------------------------------

### EIA 608 Closed Caption Extended Characters (0x1220+n)

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/vbi/test/unicode-out-ref.txt

Defines a set of extended characters for EIA 608 Closed Captioning, corresponding to the character codes starting from 0x1220, showing their visual representation.

```APIDOC
ÁÉÓÚÜü‘¡*'─©℠•“”ÀÂÇÈÊËëÎÏïÔÙùÛ«»
ÁÉÓÚÜÜ‘¡*'─©℠•“”ÀÂÇÈÊËËÎÏÏÔÙÙÛ«»
```

--------------------------------

### Open Zapping Documentation (zapping.help)

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/ZappingCommands.html

Launches or directs the user to the official Zapping application documentation.

```APIDOC
zapping.help()
```

--------------------------------

### Open About Dialog (zapping.about)

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/ZappingCommands.html

Displays the 'About' dialog, typically containing information about the application version, credits, and licensing.

```APIDOC
zapping.about()
```

--------------------------------

### Import PGP/GPG Key from AUTHORS File

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/Help.html

This command demonstrates how to import a PGP/GPG key from the AUTHORS file included with the Zapping source code using the 'gpg' utility. This is useful for verifying the authenticity of project files or communicating securely with contributors.

```Shell
gpg --import <AUTHORS
```

--------------------------------

### Open Screenshot Dialog (zapping.screenshot)

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/ZappingCommands.html

Launches the screenshot dialog. If a 'format' is provided, the dialog will pre-select that format. Supported formats include 'jpeg' and 'ppm'.

```APIDOC
zapping.screenshot(format: str = None)
  format: Optional. The desired screenshot format. Valid values: 'jpeg', 'ppm'.
```

--------------------------------

### Zapping Command Line Interface (CLI) Commands

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/ZappingCommands.html

This section details how to execute commands directly from the command line when launching Zapping or sending commands to a running instance. It covers the initial 'set_channel' command and the 'zapping_remote' utility for post-0.7 versions.

```Shell
zapping -c "command"
```

```APIDOC
set_channel (name | number)
Switch to the channel. By default the command tries to find the channel by its name (second column in the channel editor). When no such channel exists or the parameter is a number it selects the nth channel from the list, counted from zero up.
```

```Shell
zapping_remote "command"
```

--------------------------------

### Open Channel Editor Dialog (zapping.channel_editor)

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/ZappingCommands.html

Launches the dialog for managing and editing channel configurations.

```APIDOC
zapping.channel_editor()
```

--------------------------------

### Open Plugin Properties Dialog (zapping.plugin_properties)

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/ZappingCommands.html

Initiates the dialog specifically for configuring plugin-related properties and settings.

```APIDOC
zapping.plugin_properties()
```

--------------------------------

### Zapping Python API: General Commands

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/ZappingCommands.html

This section details general-purpose Python commands available in Zapping, allowing programmatic control over application behavior such as termination, display mode switching, channel navigation, and window management. Parameters in square brackets are optional, and 'toggle' parameters can be 0, non-zero, or omitted.

```Python
zapping.quit()
```

```APIDOC
zapping.switch_mode('mode'): Switch the current display mode:
  'fullscreen': display video fullscreen, in capture or overlay mode
  'capture': display video in a window in capture mode
  'preview': display video in a window in overlay mode
  'teletext': display Teletext in the main window
```

```Python
zapping.toggle_mode('mode')
```

```APIDOC
zapping.restore_mode('mode'): Synonym for zapping.toggle_mode(), deprecated.
```

```Python
zapping.channel_up()
```

```Python
zapping.channel_down()
```

```Python
zapping.set_channel(nth)
```

```Python
zapping.lookup_channel('name')
```

```Python
zapping.resize_screen(width, height)
```

```Python
zapping.picture_size_cycle([n])
```

```Python
zapping.hide_controls(toggle)
```

```Python
zapping.keep_on_top(toggle)
```

--------------------------------

### Open Recording Dialog (zapping.record)

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/ZappingCommands.html

Opens the recording dialog. If a 'format' is provided, it switches to that recording configuration. Note that 'format' here refers to a user-defined configuration name, not a file format like MP4 or AVI.

```APIDOC
zapping.record(format: str = None)
  format: Optional. The name of the recording configuration to switch to.
```

--------------------------------

### Open Properties Dialog (zapping.properties)

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/ZappingCommands.html

Opens the general properties dialog. It can optionally navigate directly to a specific 'group' and 'item' within the properties, providing quick access to relevant settings.

```APIDOC
zapping.properties(group: str = None, item: str = None)
  group: Optional. The name of the property group to open.
  item: Optional. The name of the specific item within the group to highlight.
```

--------------------------------

### Go to Teletext Home Page (zapping.ttx_home)

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/ZappingCommands.html

Navigates the current Teletext window to its designated home page, which is typically page 100.

```APIDOC
zapping.ttx_home()
```

--------------------------------

### Open New Teletext Window (zapping.ttx_open_new)

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/ZappingCommands.html

Opens a new Teletext display window. If a 'page' number is provided, the window will immediately navigate to that page. An optional 'subpage' can also be specified.

```APIDOC
zapping.ttx_open_new(page: int = None, subpage: int = None)
  page: Optional. The Teletext page number to open.
  subpage: Optional. The Teletext subpage number to open.
```

--------------------------------

### Display OSD Text with Pango Markup (zapping.osd_render_markup)

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/ZappingCommands.html

Displays text directly on the screen (On-Screen Display) using Pango markup for rich text formatting. This allows for styling like bold, italic, and color.

```APIDOC
zapping.osd_render_markup(text: str)
  text: Required. The string to display, which can include Pango markup tags.
```

--------------------------------

### Checkout ZVBI Source Code from SVN Repository

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/ZVBI/Download.html

Commands to anonymously check out the libzvbi source code from the project's SVN repository. You can choose to download the latest development version from 'trunk' or a specific tagged release.

```Shell
svn checkout https://svn.code.sf.net/p/zapping/svn/trunk/vbi vbi
```

```Shell
svn checkout https://svn.code.sf.net/p/zapping/svn/tags/zvbi-0-2-8/vbi vbi
```

--------------------------------

### Open Picture Controls Dialog (zapping.control_box)

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/ZappingCommands.html

Initiates the dialog window that allows users to adjust picture-related settings within the Zapping application.

```APIDOC
zapping.control_box()
```

--------------------------------

### Legacy Keyboard Customizable Commands in Zapping

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/ZappingCommands.html

These commands were assignable to keyboard keys in older versions of Zapping. While superseded by Python commands, they are still supported for compatibility and are automatically converted. Parameters in square brackets are optional.

```APIDOC
channel_up
channel_down
set_channel n
lookup_channel name
mute [toggle]
volume_incr [n]
ttx_open_new [page [subpage]]
ttx_page_incr [n]
ttx_subpage_incr [n]
ttx_home
ttx_hold [toggle]
ttx_reveal [toggle]
screenshot [format]
quickshot [format]
```

--------------------------------

### Go to Next Teletext History Page (zapping.ttx_history_next)

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/ZappingCommands.html

Navigates forward to the Teletext page that was visited immediately after the current one in the browsing history.

```APIDOC
zapping.ttx_history_next()
```

--------------------------------

### Update Zapping Source Code via SVN

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/Download.html

Command to retrieve the latest changes for an already checked-out Zapping source code directory. This updates your local copy to match the current state of the SVN repository.

```SVN
svn update
```

--------------------------------

### Download Latest Zapping Source Code via SVN Trunk

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/Download.html

Command to anonymously check out the latest development version of Zapping from the SVN trunk repository. This provides access to the most recent changes and features.

```SVN
svn checkout https://svn.code.sf.net/p/zapping/svn/trunk/zapping zapping
```

--------------------------------

### Go to Previous Teletext History Page (zapping.ttx_history_prev)

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/ZappingCommands.html

Navigates back to the Teletext page that was visited immediately before the current one in the browsing history.

```APIDOC
zapping.ttx_history_prev()
```

--------------------------------

### Take Quick Screenshot (zapping.quickshot)

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/ZappingCommands.html

Captures a screenshot immediately without opening the dialog. It uses the last selected file name, appending an incrementing number. If no format is specified, the last used format will be applied.

```APIDOC
zapping.quickshot(format: str = None)
  format: Optional. The desired screenshot format. If not provided, the last selected format is used.
```

--------------------------------

### Update ZVBI SVN Source Code

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/ZVBI/Download.html

After an initial SVN checkout, use this command within the "vbi" directory to retrieve the latest changes and updates from the SVN repository.

```Shell
svn update
```

--------------------------------

### Send Quick Screenshot Command to Zapping

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/ZappingRemote.html

Sends a 'quickshot' command to the running Zapping process to take a screenshot in JPEG format without displaying a dialog.

```Bash
zapping_remote "zapping.quickshot('JPEG')"
```

--------------------------------

### Download Specific Zapping Version via SVN Tag

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/Download.html

Command to anonymously check out a specific tagged version of Zapping (e.g., 0.7) from the SVN repository. This is useful for accessing stable releases or particular development milestones.

```SVN
svn checkout https://svn.code.sf.net/p/zapping/svn/**tags/zapping-0-7**/zapping zapping
```

--------------------------------

### Display OSD Text (zapping.osd_render)

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/ZappingCommands.html

Displays plain text directly on the screen (On-Screen Display) without any special formatting.

```APIDOC
zapping.osd_render(text: str)
  text: Required. The string to display.
```

--------------------------------

### Create GTK Window with Quit Button for Zapping

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/ZappingRemote.html

Executes a Python script via `zapping_remote` to create a new GTK window with a 'Quit' button. Clicking this button will terminate the Zapping application.

```Bash
zapping_remote '
import gtk

def on_quit(*args):
        zapping.quit()
 
window = gtk.Window()
button = gtk.Button("Quit")
button.connect("clicked", on_quit)
window.add(button)
window.show_all()
'
```

--------------------------------

### Bind Zapping Commands to Remote Control Buttons

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/ChangeVideoInput.html

These commands can be assigned to remote control buttons or keyboard shortcuts to directly select a channel by its numeric index or by its configured name (e.g., 'svideo'). This allows for programmatic control over channel selection within the Zapping application.

```Zapping Command
zapping.set_channel(0)
```

```Zapping Command
zapping.lookup_channel('svideo')
```

--------------------------------

### Toggle Audio Mute (zapping.mute)

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/ZappingCommands.html

Controls the audio mute state. Set 'toggle' to true to mute the audio, false to unmute it.

```APIDOC
zapping.mute(toggle: bool)
  toggle: Required. Boolean value to mute (true) or unmute (false) audio.
```

--------------------------------

### Stop Recording (zapping.stoprec)

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/ZappingCommands.html

Halts any active recording process.

```APIDOC
zapping.stoprec()
```

--------------------------------

### Increment Control Value (zapping.control_incr)

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/ZappingCommands.html

Adjusts the value of a specified control by 'n' units. 'n' is typically +1 or -1, with a default of +1. This function supports various picture and audio controls, including brightness, contrast, saturation, hue, volume, bass, and treble.

```APIDOC
zapping.control_incr(name: str, n: int = 1)
  name: Required. The name of the control to adjust. Valid values are:
    - 'brightness': Picture brightness
    - 'contrast': Picture contrast
    - 'saturation': Picture color saturation
    - 'hue': Picture color hue
    - 'volume': Audio volume
    - 'bass': Audio bass
    - 'treble': Audio treble
  n: Optional. The amount to increment or decrement the control value. Default is 1.
```

--------------------------------

### Toggle Teletext Reveal (zapping.ttx_reveal)

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/ZappingCommands.html

Determines whether concealed or hidden characters on the current Teletext page should be made visible. Set 'toggle' to true to reveal, false to conceal.

```APIDOC
zapping.ttx_reveal(toggle: bool)
  toggle: Required. Boolean value to reveal (true) or conceal (false) hidden Teletext characters.
```

--------------------------------

### Toggle Teletext Page Hold (zapping.ttx_hold)

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/ZappingCommands.html

Controls the 'hold' state for the current Teletext page. When 'toggle' is true, the page remains static. When false, if the page has multiple subpages, Zapzilla will automatically cycle through them.

```APIDOC
zapping.ttx_hold(toggle: bool)
  toggle: Required. Boolean value to set the hold state (true for hold, false for rotate subpages).
```

--------------------------------

### Toggle Closed Caption Display (zapping.closed_caption)

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/ZappingCommands.html

Controls the visibility of closed captions. Set 'toggle' to true to display captions superimposed on the video, false to hide them.

```APIDOC
zapping.closed_caption(toggle: bool)
  toggle: Required. Boolean value to display (true) or hide (false) closed captions.
```

--------------------------------

### Generic Character Mapping with Hebrew and Latin Characters

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/vbi/test/unicode-out-ref.txt

A character mapping table displaying a mix of Latin alphanumeric characters, symbols, and Hebrew characters, potentially representing a custom or legacy encoding.

```APIDOC
# 3 C S ד ף 
$ 4 D T ה פ 
% 5 E U ו ץ 
& 6 F V ז צ 
' 7 G W ח ק 
( 8 H X ט ר 
) 9 I Y י ש 
* : J Z ך ת 
+ ; K ← כ ₪ 
, < L ½ ל ‖ 
- = M → ם ¾ 
. > N ↑ מ ÷ 
/ ? O # ן ■ 
```

--------------------------------

### Teletext Composed Glyphs (Lowercase ASCII Range)

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/vbi/test/unicode-out-ref.txt

Illustrates the composition of teletext glyphs using a base lowercase character set (ASCII a-z) and various diacritical marks, showing the resulting combined characters.

```APIDOC
   `abcdefghijklmnopqrstuvwxyz{¦}~■

   `abcdefghijklmnopqrstuvwxyz{¦}~■
ˋ  -à---è---ì-----ò-----ù----------
ˊ  -á-ć-é---í--ĺ-ńó--ŕś-ú---ýź-----
ˆ  -â-ĉ-ê-ĝĥîĵ----ô---ŝ-û-ŵ-ŷ------
˜  -ã-------ĩ----ñõ-----ũ----------
ˉ  -ā---ē---ī-----ō-----ū----------
˘  -ă---ĕ-ğ-ĭ-----ŏ-----ŭ----------
˙  ---ċ-ė-ġ------------------ż-----
¨  -ä---ë---ï-----ö-----ü---ÿ------
.  --------------------------------
˚  -å-------------------ů----------
ˏ  ---ç---ģ---ķļ-ņ---ŗşţ-----------
ˍ  --------------------------------
˝  ---------------ő-----ű----------
˛  -ą---ę---į-----------ų----------
ˇ  ---čďě------ľ-ň---řšť-----ž-----
```

--------------------------------

### ETS 300 706 G3 Smooth Mosaics and Line Drawing Character Set

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/vbi/test/unicode-out-ref.txt

Defines the G3 Smooth Mosaics and Line Drawing character set as specified in ETS 300 706 Table 48, showing the visual representation of each character.

```APIDOC
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
      
```

--------------------------------

### Teletext Composed Glyphs (Uppercase ASCII Range)

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/vbi/test/unicode-out-ref.txt

Illustrates the composition of teletext glyphs using a base uppercase character set (ASCII A-Z) and various diacritical marks, showing the resulting combined characters.

```APIDOC
   @ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_

   @ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_
ˋ  -À---È---Ì-----Ò-----Ù----------
ˊ  -Á-Ć-É---Í--Ĺ-ŃÓ--ŔŚ-Ú---ÝŹ-----
ˆ  -Â-Ĉ-Ê-ĜĤÎĴ----Ô---Ŝ-Û-Ŵ-Ŷ------
˜  -Ã-------Ĩ----ÑÕ-----Ũ----------
ˉ  -Ā---Ē---Ī-----Ō-----Ū----------
˘  -Ă---Ĕ-Ğ-Ĭ-----Ŏ-----Ŭ----------
˙  ---Ċ-Ė-Ġ-İ----------------Ż-----
¨  -Ä---Ë---Ï-----Ö-----Ü---Ÿ------
.  --------------------------------
˚  -Å-------------------Ů----------
ˏ  ---Ç---Ģ---ĶĻ-Ņ---ŖŞŢ-----------
ˍ  --------------------------------
˝  ---------------Ő-----Ű----------
˛  -Ą---Ę---Į-----------Ų----------
ˇ  ---ČĎĚ------Ľ-Ň---ŘŠŤ-----Ž-----
```

--------------------------------

### Increment Teletext Page (zapping.ttx_page_incr)

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/ZappingCommands.html

Changes the currently displayed Teletext page number by 'n' units. 'n' can be positive to advance or negative to go back. The default increment is 1.

```APIDOC
zapping.ttx_page_incr(n: int = 1)
  n: Optional. The number of pages to increment or decrement. Default is 1.
```

--------------------------------

### ETS 300 706 Table 36: Latin National Option Sub-sets

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/vbi/test/unicode-out-ref.txt

Defines the Latin National Option Sub-sets, providing specific character mappings for various Latin-based languages within the ETS 300 706 standard.

```APIDOC
# ů č ť ž ý í ř é á ě ú š 
£ $ @ ← ½ → ↑ # — ¼ ‖ ¾ ÷ 
# õ Š Ä Ö Ž Ü Õ š ä ö ž ü 
é ï à ë ê ù î # è â ô
```

--------------------------------

### Increment Teletext Subpage (zapping.ttx_subpage_incr)

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/ZappingCommands.html

Changes the currently displayed Teletext subpage number by 'n' units. 'n' can be positive to advance or negative to go back. The default increment is 1.

```APIDOC
zapping.ttx_subpage_incr(n: int = 1)
  n: Optional. The number of subpages to increment or decrement. Default is 1.
```

--------------------------------

### EIA 608 Closed Caption Basic Character Set

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/vbi/test/unicode-out-ref.txt

Lists the basic character set used in EIA 608 Closed Captioning, including standard ASCII characters and some special symbols, showing both uppercase and lowercase variations.

```APIDOC
  ( 0 8 @ H P X ú h p x          ( 0 8 @ H P X Ú H P X 
! ) 1 9 A I Q Y a i q y        ! ) 1 9 A I Q Y A I Q Y 
" á 2 : B J R Z b j r z        " Á 2 : B J R Z B J R Z 
# + 3 ; C K S [ c k s ç        # + 3 ; C K S [ C K S Ç 
$ , 4 < D L T é d l t ÷        $ , 4 < D L T É D L T ÷ 
% - 5 = E M U ] e m u Ñ        % - 5 = E M U ] E M U Ñ 
& . 6 > F N V í f n v ñ        & . 6 > F N V Í F N V Ñ 
' / 7 ? G O W ó g o w ■        ' / 7 ? G O W Ó G O W ■ 
```

--------------------------------

### Increment Audio Recording Volume (DEPRECATED) (zapping.volume_incr)

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/web/htdocs/Zapping/ZappingCommands.html

This command was previously used to change the audio recording volume but is now deprecated and no longer supported. Users should instead use `zapping.control_incr('volume'[, n])` to adjust the soundcard mixer or video device volume as configured in the preferences dialog. Note that this command does not affect the mute state.

```APIDOC
zapping.volume_incr(n: int = 1) (DEPRECATED)
  n: Optional. The amount to increment or decrement the volume. Default is 1.
  Note: This function is no longer supported. Use zapping.control_incr('volume'[, n]) instead.
```

--------------------------------

### ETS 300 706 G1 Block Mosaics Character Set

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/vbi/test/unicode-out-ref.txt

Defines the G1 Block Mosaics character set as specified in ETS 300 706 Table 47, showing the visual representation of each character.

```APIDOC
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
        
```

--------------------------------

### Teletext Composed Glyphs (Unicode U+0100 to U+017F)

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/vbi/test/unicode-out-ref.txt

Provides a mapping of teletext composed glyphs corresponding to the Unicode range U+0100 through U+017F, showing their visual representation.

```APIDOC
Ā - Ġ İ - Ő Š Ű 
ā - ġ - - ő š ű 
Ă Ē Ģ - - - Ţ Ų 
ă ē ģ - Ń - ţ ų 
Ą Ĕ Ĥ Ĵ ń Ŕ Ť Ŵ 
ą ĕ ĥ ĵ Ņ ŕ ť ŵ 
Ć Ė - Ķ ņ Ŗ - Ŷ 
ć ė - ķ Ň ŗ - ŷ 
Ĉ Ę Ĩ - ň Ř Ũ Ÿ 
ĉ ę ĩ Ĺ - ř ũ Ź 
Ċ Ě Ī ĺ - Ś Ū ź 
ċ ě ī Ļ - ś ū Ż 
Č Ĝ Ĭ ļ Ō Ŝ Ŭ ż 
č ĝ ĭ Ľ ō ŝ ŭ Ž 
Ď Ğ Į ľ Ŏ Ş Ů ž 
ď ğ į - ŏ ş ů - 
```

--------------------------------

### Teletext Composed Glyphs (Unicode U+0080 to U+00FF)

Source: https://github.com/zapping-vbi/vbi-archive/blob/trunk/vbi/test/unicode-out-ref.txt

Provides a mapping of teletext composed glyphs corresponding to the Unicode range U+0080 through U+00FF, showing their visual representation.

```APIDOC
- - - - À - à - 
- - - - Á Ñ á ñ 
- - - - Â Ò â ò 
- - - - Ã Ó ã ó 
- - ¤ - Ä Ô ä ô 
- - - - Å Õ å õ 
- - ¦ - - Ö - ö 
- - - - Ç - ç - 
- - - - È - è - 
- - - - É Ù é ù 
- - - - Ê Ú ê ú 
- - - - Ë Û ë û 
- - - - Ì Ü ì ü 
- - - - Í Ý í ý 
- - - - Î - î - 
- - - - Ï - ï ÿ 
```
Tokens:
Raw